Nut-lock.



No. 887,574. PATENTED MAY 12, 1908.

J. T. BARR.

NUT LOOK.

PPPPPP ATION FILED FEB- 13, 1908.

JAMES T. BARR, OF APOLLO, PENNSYLVANIA.

NUT-LOCK.

Specification of Letters Patent.

Patented May 12, 1908.

Application filed February 13, 1908. Serial No. 415,641.

To all whom it may concern: I Be it known that I, JAMES T. BARR, a citizen of the United States of America, residin at Apollo, inthe county of Armstrong an State of Penns lvania, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification, reference being had therein to the accompanying drawing.

This lnvention'relates to nut locks, and the object of my invention is, to provide simple and effective means for retaining a nut upon a bolt.

To this end, I have devised positive and reliable rneans for reventing a nut from becoming accidenta ly displaced from a bolt,

due to any vibrations to which the bolt may' besubjected. In this connection, the nut lock is articularl designed for rail joints and sue bodies w e're it is essential that the nut be at all times retained upon the bolt.

The construction of my nut lock is such that it can be installed without the use of skilled labor, and easily removed, without destroying the bolt or nut.

.Theidetail construction entering into myinvention will be presently described and then specifically pointed out in the appended claims. i

Referring to the drawing: Figure 1 is a view in elevation of a nut lock embodying my invention, Fig. 2 a longitudinal sectional .view of the same, Fig. 3 a cross sectional view taken on the line :c-ac of Fig. 2, Fig. 4 is an elevation of a washer used in connection with the nut lock, and Fig. 5 is a perspective view 4, the outer face of sai nut having'a plurality of radially disposed slots 5 formed therein. Adapted to fit 111 one of said slots is a locking pin 6 having a projection 7 adapted to extend into the groove 3 and into the face of the nut 4, as shownin Fig. 2 of the drawings.

Mounted upon the bolt 2 to lock the looking pin 6 in position is a washer 8', this washer having an inwardl extending tooth 9 adapted to engage in t e groove 3 of the bolt 2. The washer 8 is formed with a projecting lug 10 adapted to be bent to'en age the end of the locking in 6. For hol in the washer against the ace ofthe nut 4, employ another nut 12 and this nut is retained upon the bolt 2 by one or more lugs 13 carried by the washer 8 and bent to en age the edges of the nut 12. oval opening, a small groove can be cut in the bolt some'distance from the end thereof, to

lockin pin 6 in position, and that it is imossib e for the nut 4 to rotate so long as the ocking pin rests or engages in the roove 3. Having now described my invention what I claim as new, is:

In a nut lock, the combination with a rooved bolt, ofa nut, one face of said nut aving slots formed therein, a locking pin adapted to rest in one of said slots and en- In providing t e washer 8 with an' gage in the groove of said bolt, a washer. fitting upon said nut, an inwardly protruding on, and lugs carried by said washer for engagin said nut and preventing a rotation thereof. in testimony whereof I aflix my signature in the presence of two witnesses.

JAMES T. BARR.

Witnesses:

. S. A. 'GQURLEY,

EARLE F. COQHRANE. 

